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33,442
RESULTS

Media Type
21,314
texts
6,055
audio
4,666
movies
849
images
418
concerts
97
data
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Topics & Subjects
7,322
NASA Technical Reports Server (NTRS)
4,982
ERIC Archive
1,383
DTIC Archive
759
Higher Education
661
Robert Heron
499
rev3
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Collection
7,322
NASA Network Resource and Training Site
4,952
Education Resources Information Center (ERIC) Archive
4,739
Community Audio
4,178
American Libraries
1,500
Community Video
1,383
Defense Technical Information Archive
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Creator
7,322
nasa technical reports server (ntrs)
4,982
eric
1,383
defense technical information center
549
nasa
499
revision 3
455
twit
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Language
23,531
English
746
French
249
German
171
Spanish
166
Hungarian
123
Italian
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